In case you can not access the Firefox store, you can also download the ".xpi" add-on
from this link.

In order to install the San Jose-Knox Avenue, Santa Clara, California Air Quality Widget on your favorite iPhone or iPod device,
just launch the internet browser from your device and open the web page:
"
http://ios.aqicn.org/?8355".

Or just scan this QR-code:

Then click on this icon to install the widget as an application
directly accessible from your iPhone homescreen.

You can download the San Jose-Knox Avenue, Santa Clara, California Air Quality Widget for your favorite Windows Mobile 8 or 8.1,
directly from the Microsoft application store:

In order to install the San Jose-Knox Avenue, Santa Clara, California Air Quality Widget on your favorite Symbian device,
just download the "San Jose-Knox Avenue, Santa Clara, CaliforniaAir.wgz" and install on your phone using Nokia Suite.

In order to install the San Jose-Knox Avenue, Santa Clara, California Air Quality Widget on your Windows Desktop,
just download the "San Jose-Knox Avenue, Santa Clara, California.gadget" and let you be guided through the Windows installer.